K 10
svn:author
V 3
jah
K 8
svn:date
V 27
2015-08-14T20:08:16.559204Z
K 7
svn:log
V 401
Use pmap_quick_enter_page() to handle bouncing of unmapped buffers in the x86 busdma_bounce implementation.  Also treat user buffers as unmapped.
This allows two things:
1. Sync'ing bounced maps in non-sleepable contexts.  The physcopy* calls previously used could sleep on sf_buf operations in some cases.
2. Sync'ing user buffers outside the context of the owning process

Approved by:	kib (mentor)

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